SI5518E-B15685-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5518E-B15685-GMR is a NetSync network synchronizer manufactured by Skyworks Solutions. It features four DSPLLs and six clock inputs, providing up to eighteen outputs with a maximum frequency of 3.2 GHz. The device delivers ultra-low jitter performance of less than 55 fs RMS. It supports IEEE 1588 Precision Time Protocol applications and includes 1PPS input/output capabilities. The component operates within a temperature range of -40°C to +85°C and utilizes a 72-QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates four DSPLLs for complex synchronization architectures
• Supports Synchronous Ethernet wander filtering and hitless switching
• Provides programmable output formats including LVPECL, LVDS, HCSL, CML, and LVCMOS

Clock Generators, PLLs, Frequency Synthesizers Applications

• 5G Radio Units (RU) and O-RAN Small Cells
• IEEE 1588 Boundary Clocks and Grandmasters
• Core, Metro, and Edge Switches/Routers

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm pinout compatibility and internal configuration. Confirm availability status directly with authorized distributors as supply conditions may vary. Ensure the selected variant matches the required voltage levels and package specifications for the target design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when designing systems requiring high channel counts and precise time synchronization. The integrated architecture replaces multiple discrete oscillators and buffers. Evaluate the need for external crystal references versus internal options based on system jitter requirements and board space constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the NetSync family of network synchronizers designed for telecom and data center infrastructure. It combines jitter attenuation with network synchronization functions. The series supports advanced timing protocols essential for modern wireless and wired communication networks.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Consult the Skyworks Timing Selector Guide for alternative models with similar output counts or jitter specifications. Verify that any substitute maintains compatibility with existing IEEE 1588 software stacks and physical interface requirements.